JPH02253068A - Multistage flow controller - Google Patents

Abstract

PURPOSE:To prevent the impossibility of valve operation by precipitation of calcium by making a partition part between fluid passages with a bellows partition member fixed between a valve body and a casing, thereby eliminating the presence of sliding part between the partition member and a valve stem. CONSTITUTION:Two systems of fluid delivery parts 3b, 4b are connected to fluid passages 3, 4, of a flow controller, respectively. When the lower stream of the delivery part 3b is closed in the state where the fluid passages 3, 4 supply a fluid, the pressure of the delivery part 3b is raised, and the fluid flows into a control chamber 7 through a passage 9 to raise the pressure in the chamber. Consequently, a diaphragm 5 and a valve stem 8 combined thereto are lowered, and respective control parts 3c, 4c are simultaneously closed by valve bodies 8a, 8b. As a flexible bellows partition member 2 moves following the valve stem 8 at the time of opening and closing movement of the valve stem 8 as described above, no sliding part is present between the partition member 2 and the valve stem 8. Thus, no trouble of valve operation by precipitation of calcium is caused.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention has a plurality of fluid passages inside, and mechanically controls the opening and closing of valves in other passages by opening and closing a snake 1 that communicates with one passage. The present invention relates to improvements in multi-stage flow control devices, and in particular to improvements in flow switch valves suitable for opening and closing flow channels in continuous flow type electrolyzed ionized water generating devices.

[Problem to be solved by the invention]

The so-called continuous water flow type electrolytic ionized water generator, which electrolyzes water while supplying it to an electrolytic cell equipped with a cathode chamber and an anode chamber, and extracts alkaline ionized water and acidic ionized water, has a pair of drainage systems for alkaline water and acidic water. It is necessary to open and close roads at the same time. For this reason, the inventor of the present invention previously proposed
We have developed a multi-stage flow valve that has multiple internal passages, such as 1-e, and opens and closes other passages mechanically by opening and closing a faucet leading to one passage. This flow valve has the excellent function of detecting no flow in one passage and mechanically opening and closing the other passage, and has already been established as U.S. Patent No. 4,788.383. If a valve with a structure in which a valve stem is slidably penetrated through a partition wall between multiple passages is used in a drainage channel for alkaline ionized water, problems such as calcium precipitation causing the valve to become inoperable tend to occur.

As a result of various studies to solve this problem, the present inventor has recently developed a new flow control device in which the partition walls of multiple passages are composed of flexible diaphragms and the diaphragms are hermetically fixed to the valve stem. It's arrived.

However, if the flexible partition member is simply fixed to the valve body, the supporting force of the valve body becomes unstable and alignment between the valve body and the center of the valve seat is difficult to achieve.

Therefore, the main objective of the present invention is to eliminate troubles caused by calcium precipitation by eliminating the sliding part of the valve body (and also to ensure a flow that guarantees automatic alignment with the center of the valve seat when the valve body is operated). The purpose is to provide a control device.

[Means to solve the problem]

In order to achieve the above object, the present invention is characterized in that a plurality of fluid passages, each of which is divided into a fluid introduction part and a fluid outlet part, are connected in multiple stages in a valve casing through a flow control part. An interlocking system in which a control chamber partitioned by a tire phragm is provided adjacent to the fluid introduction part of the valve casing, and a plurality of valve bodies are provided that penetrate the partition between multiple valve casings and correspond to the flow control part of each valve casing. In a multi-stage flow control device in which one side of a valve member is supported by the diaphragm and the control chamber and a fluid outlet portion of one of the valve casings are communicated through a passage, a plurality of fluid passages of the valve casing through which the valve member passes. A hollow cylindrical part of a predetermined length is formed between the valve casings, and a flexible bellows-shaped partition member having a hollow cylindrical body part that matches the inner diameter of this cylindrical part is fitted into the cylindrical part between the valve casings. The open periphery of the bellows-shaped partition member on one end side is liquid-tightly fixed to the inner circumferential wall of the cylindrical portion between the valve casings, and the other side periphery is liquid-tightly fixed to the valve member.

The purpose of the present invention is to form a bellows partition member into a member having a cylindrical body made of a flexible material and having a U-shaped cross section, and integrally provided with a closing attachment part for the valve member at the center of the inside of the bottom part. This can be accomplished by inverting the flexible cylindrical body and securing its open end periphery to the cylindrical inner wall of the valve casing, and by securing the closing fitting to the valve member.

[Action of the invention]

Since the present invention is composed of a flexible bellows-shaped partition member stretched between a plurality of passage partition walls or a valve casing and a valve body, the bellows partition member expands and contracts in accordance with the reciprocating movement of the valve body. However, there is no sliding part between the valve body and the partition wall.

Further, when the valve element reciprocates, the bellows partition member expands and contracts so as to press its outer circumferential surface against the inner circumferential wall of the cylindrical body portion having a predetermined length, so that a uniform pressing force is applied from the circumference to the valve stem.

Therefore, the tip of the valve body always points towards the center of the valve seat, providing automatic centering action.

In addition, the partition member is formed into a member that is made of a flexible material and has a U-shaped cross section, and has a closing attachment part for the valve member integrally provided at the center inside the bottom of the member, and the flexible cylindrical part of this member is turned inside out. When the peripheral edge of the open end is fixed to the cylindrical inner wall of the valve casing and the closing mounting portion is fixed to the valve member, elastic force and restoring force due to turning the flexible cylindrical body part act,
The reciprocating movement of the valve stem becomes more stable and smooth.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1, the flow control device of the present invention includes a fluid passage 3. /1 in two stages along the axial direction, and each fluid passage 3.4 has a fluid inlet part 3a, 4a and an outlet part 3, respectively.
b, 4b, and a flow control section 3C4c such as a valve seat is coaxially provided in the passages 3 and 4 along the axial direction of the casing 1.

A diaphragm 5 is elastically stretched in the transverse direction of the casing 1 above the upper fluid passage 3, and a lid member 6 is joined above the diaphragm 5. A control chamber 7 partitioned by a diaphragm 5 made of a flexible material such as diaphragm 5 is connected thereto.
One side of a valve rod 8 is supported at the center of the diaphragm 5 .

This valve stem 8 passes through the flow control part (valve seat) 3c of the upper passage 3 and extends to the flow control part (valve seat) 4C of the lower passage 4, and the shaft body has each flow control part 3c. , 4c are attached, and as a whole constitute a valve member that simultaneously controls the opening and closing of the flow control sections 3c and 4c of the fluid passages 3 and 4.

Furthermore, the control chamber 7 communicates via a passage 9 with an outlet of one of the fluid passages. In the embodiment shown, this passage 9 is drilled in the shaft of the valve stem 8 and is connected to the control chamber 7.
The outlet portion 3b of the two-stage fluid passage 3 is communicated with the outlet portion 3b of the two-stage fluid passage 3.

In a multi-stage flow control device having such a configuration, the features of the present invention are that a cylindrical portion 10 of a predetermined length is formed between -1 and lower fluid passage 3°4, and that the cylindrical portion 1
A flexible bellows-shaped partition member 2 having a hollow cylindrical body portion 2a adapted to the inner diameter of 0 is fitted into the cylindrical portion 10, and the peripheral edge of the open-side mounting portion 2b of the bellows-shaped partition member 2 is attached to the casing 1. The second end (lower end) of the partition member 2 is fixed to the inner circumferential wall of the cylindrical portion 10 in a fluid-tight manner, and the peripheral edge of the closing attachment portion 2C of the other end (lower end) of the partition member 2 is fixed to the valve stem 8.

Since the valve stem 8 has a smaller diameter than the cylindrical part 10 of the casing 1, when the lower end of the bellows-shaped partition member 2 fixed to the valve stem 8 moves downward together with the valve stem 8, the partition member 2 The closing attachment part 2c enters into the cylindrical body part 2a, and a folded part 2d having a U-shaped cross section is formed between the cylindrical body part 2a and the closing attachment part 2c.

In addition, the embodiment shown in the figure is the closing attachment part 2 of the bellows-like partition member 2.
c is coupled to the valve body 8b of the lower passage 4 and is integrally molded with the valve body 8b, but the present invention is not limited to this, and it is also possible to directly couple it to the shaft body of the valve rod 8. It is.

The bellows-like partition member 2 is fitted into the cylindrical part 10 of the casing 1, and the outer peripheral surface of the hollow cylindrical part 2a is supported in contact with the inner peripheral wall of the cylindrical part 10, so that the cross section U around the valve body axis is A uniform elastic force is applied to the letter-shaped folded portion 2d toward the valve body axis, and as a result, the valve stem 8 is vertically moved without shifting to one side.
Move down two times.

] This shows a two-stage diagram. That is, as shown in FIG. 2a, first, using a flexible material such as rubber, a member having an inverted U-shaped cross section and integrally having a closing attachment part 2d to the valve stem 8 in the center of the cylindrical body 2a is shaped like I. Then, the cylindrical body part 2a of this member
If you fold it back in the direction of arrow X, or push out the closing attachment part 2c in the direction of arrow Y, then turn the cylinder body part 2a inside out and inside out, and then push the closure attachment part 2c back slightly into the cylinder body part 2a, as shown in Fig. 2b. A bellows-shaped partition member 2 as shown in FIG. By turning the bellows partition member 2 manufactured in this manner inside out, the cross section U around the cylindrical body part 2a and the closing attachment part 20 is
Appropriate elastic force, restoring force, and elasticity are imparted to the letter-shaped folded portion 2d.

In the figure, 11 is a magnet that is integrally fixed to the upper part of the valve stem 8, 12 is a detection switch such as a reed switch or a limit switch that detects the position of this magnet (i.e., the valve body) and sends a signal, and 13 is a detection switch such as a limit switch. It's a spring.

Next, the present invention will be explained in detail.

A system of fluid pipes (for example, an alkaline ionized water discharge pipe and an acidic water drainage pipe of the electrolyzed ionized water generator) is connected to the fluid passages 3 and 4 of the flow control device, and the fluid passage 3 communicates with the control chamber 7. A water intake member (not shown) such as a faucet cock is used in the downstream pipe line of the outlet portion 3b.

When fluid is supplied to each of the fluid pipes 3 and 4, when the downstream snake ``1'' of the fluid passage 3 is closed, the outlet portion 3 of the fluid passage 3 is closed.
The pressure at b increases and fluid flows through passage 9 into control chamber 7 above diaphragm 5 . As a result, the pressure in the control chamber 7 rises, causing the diaphragm 5 and the valve stem 8 connected thereto to fall downward in the figure, causing the valve body 3a,
8b closes each control section (valve seat) 3c, 4c at the same time.

On the other hand, when the faucet is opened, the pressure in the outlet part 3b of the passage 3 is lowered, so the fluid in the control chamber 7 is discharged and the diaphragm 5
At the same time, the valve stem 8 moves in the "1" direction in the figure, and the valve seats 3c, 4c of the fluid passages 3, 4 open simultaneously.

In the present invention, when the valve stem 8 is opened and closed, the flexible bellows-shaped partition member 2 moves following the valve stem 8, so there is a sliding part between the partition member 2 and the valve stem 8. In addition, the bellows partition member 2 supports the cylindrical portion 2a on the cylindrical portion 10 of the casing l, and supports the valve stem 8 via the folded portion 2d having a U-shaped cross section. A uniform suppressing support force is applied around the shaft toward the center of the valve stem.

In particular, if the bellows partition member 2 is made as shown in FIGS. 2a and 2b, appropriate elastic force and restoring force will act on the folded portion 2d, and the opening and closing operations of the valve stem 8 will be stabilized.

〔Effect of the invention〕

As described above, in the present invention, since the partition between the fluid passages is composed of a bellows-shaped partition member fixed between the valve body and the casing, there is no sliding part between the partition member and the valve stem. Therefore, even if alkaline ionized water is passed through the valve, there is no risk that the valve will become unable to operate due to calcium precipitation. Furthermore, since there is no sliding friction, operating resistance is also reduced.

In addition, since the bellows partition member is supported around the circumference by the cylindrical portion of the casing, a uniform centric force acts on the valve stem. For this reason, the valve stem moves vertically up and down without shifting to one side, ensuring alignment with the center of the valve seat. In particular, when the bellows partition member is made of a flexible cylindrical member turned inside out, the partition member is given appropriate elasticity and restoring force, resulting in smooth operation and improved durability. .

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a flow control according to an embodiment of the present invention, and FIGS. 2a and 2b are preferred manufacturing process diagrams of a bellows partition member. Fig. 1 1...Valve casing, 2...Bellows partition member, 2a...Cylinder part, 2d...U-shaped folded section, 3.4...Fluid passage, 3c, 4c...・
Flow control section (valve seat), 5...diaphragm, 8.
... Valve stem, 8a, 8b Valve body 1, 9... Passage,
IO-=cylindrical part, 11... magnet, 1
2...Detection switch. Patent applicant Tatsuo Okazaki Representative Patent attorney Naoyoshi Sato Figure 2a, Figure 2b]

Claims (2)

[Claims] (1) A plurality of fluid passages whose interior is divided into a fluid introduction part and a fluid outlet part are arranged in a series in multiple stages in a valve casing via a flow control part, and a diaphragm is installed adjacent to the fluid introduction part of one of the valve casings. Provided with a partitioned control chamber,
The diaphragm supports one side of an interlocking valve member that penetrates the partition between the plurality of valve casings and is provided with a plurality of valve bodies corresponding to the flow control section of each valve casing, and connects the control chamber and any of the valves. In a multi-stage flow control device in which the fluid outlet part of the casing is communicated with a passage, a hollow cylindrical part of a predetermined length is formed between the plurality of fluid passages of the valve casing through which the valve member passes, and the inner diameter of this cylindrical part is A flexible bellows-shaped partition member having a hollow cylindrical body portion conforming to the above is fitted into the cylindrical portion between the valve casings, and the open peripheral edge on one end side of the bellows-shaped partition member is inserted into the cylindrical portion between the valve casings. A multi-stage flow control device characterized in that it is liquid-tightly fixed to a peripheral wall and the other side peripheral edge is liquid-tightly fixed to a valve member. (2) The partition member is formed into a member that is made of a flexible material and has a U-shaped cross section, and has a closing attachment part for the valve member integrally provided at the center inside the bottom of the member, and the flexible cylindrical part of this member 2. The multi-stage flow control device according to claim 1, further comprising: turning over the opening end of the valve casing, fixing the peripheral edge of the open end to the cylindrical inner wall of the valve casing, and fixing the closing attachment part to the valve member.